542378531 has 2 divisors, whose sum is σ = 542378532. Its totient is φ = 542378530.

The previous prime is 542378509. The next prime is 542378609. The reversal of 542378531 is 135873245.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542378531 is a prime.

It is a super-2 number, since 2×542378531² = 588348941779435922, which contains 22 as substring.

It is equal to p_28466561 and since 542378531 and 28466561 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (542378131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271189265 + 271189266.

It is an arithmetic number, because the mean of its divisors is an integer number (271189266).

Almost surely, 2^542378531 is an apocalyptic number.

542378531 is a deficient number, since it is larger than the sum of its proper divisors (1).

542378531 is an equidigital number, since it uses as much as digits as its factorization.

542378531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The square root of 542378531 is about 23289.0216840468. The cubic root of 542378531 is about 815.5191498323.

The spelling of 542378531 in words is "five hundred forty-two million, three hundred seventy-eight thousand, five hundred thirty-one".